Spring



Aug. 6, 1935. H. LI'EBERMAN 2,010,676

SPRING Filed Sept. 1, 1955 I //V l E N TOR HARRY L. L IEBERMAN ATTKPatented Aug. 6, 1935 UNITED srArEs 1 PATENT OFFICE This inventionrelates to improvements in springs and more particularly to upholsteringspring structures wherein vertically disposed weight supporting orcushioning springs are con- '5 nected with one another by horizontallydisposed spiral spacing springs.

It is an objector this invention to provide a construction of this kindarranged in such a manner as to permit a maximum amount of flexibilitywithout being permanently distorted and at the same time to provide aconstruction to permit great economy in the manufacturing and assemblingof the parts.

It is another object of this invention to so construct the smallerhorizontally disposed spiral spacing springs, usually termed helicals,in such a manner that the ends of the helicals may be 'readily'att'achedto the upper and larger spiral of the load supporting springs and whenso attachedi will pi'eve'ntlrelative horizontal movement between thehelical and spiral.

With these and other objects in View, reference is made to theaccompanying sheet of drawing which illustrates a preferred form of thisinvention with the understanding that minor detail changes may be madewithout departing from the scope thereof.

In the drawing Figure 1 is a fragmentary top plan view showing fouradjacent large spiral load supporting springs as joined together withthe improved smaller spiral space springs or helicals.

Figure 2 is a fragmentary View in front elevation of the end of one ofthe improved helical springs.

Figure 3 is a similar view in side elevation looking at the left side ofFigure 2.

Figure 4 is a top plan view of Figure 3.

Figures 5, 6, '7, and 8 are fragmentary top plan views illustrating thesteps in attaching the heli,

cal to the coil.

Figure 9 is a fragmentary top plan view illustrating the helicalattached to the coil, as illustrated in Figure 1. a

As illustrated in Figure 1, the embodiment of this inventionincludes anumber of large weight supporting spiral springs I arranged side by sidewith their axes substantially parallel and the top coils or convolutions2 lying in substantially the same horizontal plane. The coils 2, exceptat the edges and corners, are joined on four sides to the adjacent coilsby means of small spiral or helical springs 3 preferably threaded one onthe other to cross each other at right angles, as shown in Figure 1.

In order to connect the ends of the helicals 3 to the coils 2 in such amanner as to provide'a rigid and permanent connection and which willprevent relative movement of one over the other,

each end of the helical is formed with a terminal of peculiar'construction. As shown in Figures 2, 3, and 4, the endconvolution of each helical is continued to form a portion 4 tangentialto 'said convolution, as shown particularly in Figure 4,,

and is then continued upwardly away from the said convolution to form acurved portion 5-lying in a plane forming an acute angle with'the axisof said helical, as shown particularly in Figure 3.

The curved portion 5 is-continued toward the axis of the helical tofoi'm portion 6 extending par- "all'el to the said upper convolutionandterminating approximately inline with the axis of said helical, as shownin Figure 2. The end portions intermediate its extent is bent to leavethe plane -of the portion-5,- so thatitsextremity lies substantially inthe plane passing along and adjacent the exterior convolutions of thehelical 3 with the bend therein forming the apex of an obtuse angle 1,as shown particularly in Figure 4.

The particular advantage and ease of assembly of this particularlyformed terminal of the helical is illustrated in Figures 5 to 8,inclusive, illustrating the manner of attaching the terminal to thecoil.

The assembly is started with the coil and helical in horizontalrelation, the helical held in the position shown in Figure 2 is passedover the coil 2 between the terminal convolution and the next following,in the manner shown in Figure 5, and then is rotated through an arc of180 degrees to the right, as shown in Figure 6. In these two positionsthe helical and coils are in horizontal relation. The helical is thenrotated downwardly about the coil as a pivot and in this relation thehelical is then rotated to the left through an arc of approximately 90degrees bringing the portion 6 of the terminal upon the upper side ofthe coil, as shown in Figure 7.

V of the terminal engages the under surface of the coil and the portion6 of the terminal engages the inner surface of the coil with the angularextremity thereof extending under the coil, and the portion 5 causes theportions 4 and 6 of the terminal to coact with the upper convolution ofthe helical to firmly grip the coil to such an extent that relativemovement between the coil and helical in a horizontal plane isprevented, thereby completing the assembly. In this position, the axisof the helical passes to one side of the axis of the coil, but when theopposite end of the helical is attached to the oppositely disposed coil,the axis of the helical passes through the axes of the two coils andexerts still greater tension upon the terminal and last convolution ateach end to lock the ends of the helicals to each convolution.

In the assembled position, if desired, the termination 6 may be forcedtoward the portion 4, as shown in Figure 9, by the use of pliers,although this is not necessary, to insure the helicals from becomingdetached from the coils. It being understood that the assembly may beaccomplished by holding the helical 3 stationary and the coil 2 moved toaccomplish the steps in assembling, as above described. However, it iscustomary to attach the bottom coils of the weight supportingsprings l,in the formation of mattresses, to the base member or support with thetop coils 2 lying in substantially the same plane with the axes of theconvolutions substantially parallel. The assembler grasps in one hand apair of helicals 3 intertwined, as shown in Figure l, and engages insuccession each end of each helical with the adjacent top coil 2 bytwisting and rotating each helical about each top coil by a movement or"his fingers and wrist, the resiliency of the helical allowing of thismovement when one end has been so engaged.

From the above description of the construction of the helical and itsmode of application, it is .the coil or helical. As illustrated inFigure 8,

when the helical has been attached to the coil and the axes of the sameare substantially at right angles to each other, the coil 2 passesbetween the outer convolution and the next following convolution, thenthe outer convolution passes over the coil with the tangentialcontinuation passing under the coil with the return curved portion 5returning the continuation about the coil so the portion 6 passes abovethe coil, the coil passing under, over and under the outer convolutionand continuation forms a three point contact with the coil and thehelical being resilient the three contacts grip the coil to preventsidewise or sliding movement of the terminal over the coil. When bothends of a helical have been so attached to their respective top coils 2the bedy of the helical places the respective ends under sufficienttension to cause the three point contact with the coil 12 to immediatelygrip said coil. When desired, by the application of pliers or othertools the extremity of the portion 5 may be brought nearer the portion ton the underside of the coil, although the bend of the portion 6 formingthe obtuse angle l directs the extremity in this direction.

What I claim is:

The combination of a coiled spring provided with closed undeformed endcoils with a helical spring terminating in means to engage said closedend cf the coiled spring and resist longitudinal mov HARRY L. LIEBERMAN.

